As a reminder:
http://www.e-cigarette-forum.com/forum/ecf-forum-rules/51178-forum-rules.html
Rule 30: Nicotine Strength
[1] It became obvious that some members joining in discussion of pure nicotine did not have any idea of the danger, or any knowledge of working with hazardous chemicals, or even any basic knowledge of measurements. Pure nic is as dangerous as cyanide - opening a bottle in a room can result in all present being poisoned. It must be handled in a fume cupboard, with hazmat precautions. Pure nic can be theoretically defined as: Nicotine 100%, 1000mg, 1000mg/ml, but is more likely to be found as 998mg, 997mg/ml or 990 mg (99%). We consider anything over 90% / 900mg to be 'pure nic'. No discussion of use or links to suppliers whatsoever [1.a.] are allowed.
There is a very real danger of death or hospitalization with this material and ECF cannot support any publicity of its use or sources. There is no need to use it since far safer strengths are available for bulk mixing, such as 48mg (4.8% nicotine in PG or VG), 60mg (6%), and 100mg (10%).
To protect our members and ourselves we do not allow discussion of or sources for anything over 200mg (20% nic) [1.a.].
Advertising/promotion on ECF cannot exceed 36mg strength. Vendor's sites can sell any strength up to 89% though we advise vendors to limit sales to 10% / 100mg/ml where possible. Sites selling pure nic will be banned.
[1.a.] Except within private trade forums.